Offline Controllers | NCP1200

PWM Controller, Fixed Frequency, Flyback, Current Mode

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Overview

Housed in SO-8 or DIP-8 package, the NCP1200 represents a major leap toward ultra-compact Switch-Mode Power Supplies. Thanks to a novel concept, the circuit allows the implementation of a complete offline battery charger or a standby SMPS with few external components. Furthermore, an integrated output short-circuit protection lets the designer build an extremely low-cost AC/DC wall adapter associated with a simplified feedback scheme.

With an internal structure operating at a fixed 40 kHz, 60 kHz or 100 kHz, the controller drives low gate-charge switching devices like an IGBT or a MOSFET thus requiring a very small operating power. Thanks to current-mode control, the NCP1200 drastically simplifies the design of reliable and cheap offline converters with excellent audio- susceptibility and inherent pulse-by-pulse control.

When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides excellent efficiency at light loads. Because this occurs at low peak current, no acoustic noise takes place.

Finally, the IC is self-supplied from the DC rail, eliminating the need of an auxiliary winding. This feature ensures operation in presence of low output voltage or shorts.

  • AC/DC Adapters
  • Offline Battery Chargers
  • Auxiliary/Ancillary Power Supplies (USB, Appliances, TVs, etc.)
  • No Auxiliary Winding Operation
  • Internal Output Short-Circuit Protection
  • Extremely Low No-Load Standby Power
  • Current-Mode with Skip-Cycle Capability
  • Internal Leading Edge Blanking
  • 250 mA Peak Current Source/Sink Capability
  • Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz
  • Direct Optocoupler Connection
  • Built-in Frequency Jittering for Lower EMI
  • SPICE Models Available for TRANsient and AC Analysis
  • Internal Temperature Shutdown
  • Pb-Free Packages are Available

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Orderable Parts:

6

Product

Status

CAD Models

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Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

Topology

Control Mode

fsw Typ (kHz)

Stand-by Mode

UVLO (V)

Short Circuit Protection

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Pricing ($/Unit)

NCP1200D40R2G

Last Shipments

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

Flyback

Current Mode

40

Yes

No

Yes

No

No

16

250 / 250

Price N/A

More Details

NCP1200P60G

Last Shipments

CAD Model

Pb

A

H

P

PDIP-8

626-05

NA

0

TUBE

50

N

Flyback

Current Mode

60

Yes

No

Yes

No

No

16

250 / 250

Price N/A

More Details

NCP1200P40G

Last Shipments

CAD Model

Pb

A

H

P

PDIP-8

626-05

NA

0

TUBE

50

N

Flyback

Current Mode

40

Yes

No

Yes

No

No

16

250 / 250

Price N/A

More Details

NCP1200D60R2G

Lifetime

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

Flyback

Current Mode

60

Yes

No

Yes

No

No

16

250 / 250

$0.4591

More Details

NCP1200P100G

Lifetime

CAD Model

Pb

A

H

P

PDIP-8

626-05

NA

0

TUBE

50

N

Flyback

Current Mode

100

Yes

No

Yes

No

No

16

250 / 250

$0.4761

More Details

NCP1200D100R2G

Lifetime

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

Flyback

Current Mode

100

Yes

No

Yes

No

No

16

250 / 250

$0.4584

More Details

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